Create class/method for database connection

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Hello,

I have this connection string code below;

C#

string conn = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString.ToString();
            SqlConnection cn;
            cn = new SqlConnection(conn);
            cn.Open();

How can I create a Class/Method to be able to call just a string or variable whenever I need this connection strings on my code page?

I hope my question is clear? Thanks for helping in advance.

What I have tried:

C#

string conn = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString.ToString();
            SqlConnection cn;
            cn = new SqlConnection(conn);
            cn.Open();

Posted 9-Apr-20 4:46am

Balogun Tunde

Updated 9-Apr-20 6:08am

Maciej Los

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Comments

Richard MacCutchan 9-Apr-20 11:06am

What is wrong with doing it this (correct) way?

Maciej Los 9-Apr-20 11:28am

Good point!

Maciej Los 9-Apr-20 11:27am

Why?
What you mean by: "I need this connection strings on my code page"? Can you be more specific?

Balogun Tunde 9-Apr-20 20:15pm

Thank you all for your response, I really appreciate.
The code is working perfectly, but I don't want to be copying and pasting this code everytime I want to connect to database. Im new in ASP.NET, Im coming from PHP. In PHP, you just have this code on a separate page and be referencing to the page anytime you need db connection. So, I want to achieve that too in ASP.NET.

Maciej Los 10-Apr-20 2:21am

You don't need to copy code which is responsible for connection. Take a look at solution#2 by F-ES Sitecore. I guess this is what you want.

PIEBALDconsult 9-Apr-20 11:35am

There are myriad ways. I have about a dozen, some are quite complex. It depends on what features you require.

2 solutions

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F-ES Sitecore · Answer 1 · 2020-04-09T06:08:00

C#

public static class DatabaseManager
{
    public static SqlConnection GetConnection()
    {
        return GetConnection("DefaultConnection");
    }

    public static SqlConnection GetConnection(string name)
    {
        string conn = ConfigurationManager.ConnectionStrings[name].ConnectionString.ToString();
        SqlConnection cn;
        cn = new SqlConnection(conn);
        cn.Open(); // It's not a good idea to open early, you should open right before it is needed

        return cn;
    }
}

Usage;

C#

SqlConnection con = DatabaseManager.GetConnection();

OriginalGriff · Answer 2 · 2020-04-09T05:16:00

Solution 1

This is probably overkill for what you want to do, but it does have advantages: Instance Storage - A Simple Way to Share Configuration Data among Applications[^]

Posted 9-Apr-20 5:16am

OriginalGriff

Comments

Balogun Tunde 9-Apr-20 20:17pm

Thank you for your response, I really appreciate.
The code is working perfectly, but I don't want to be copying and pasting this code everytime I want to connect to database. Im new in ASP.NET, Im coming from PHP. In PHP, you just have this code on a separate page and be referencing to the page anytime you need db connection. So, I want to achieve that too in ASP.NET.